53531520437 has 2 divisors, whose sum is σ = 53531520438. Its totient is φ = 53531520436.

The previous prime is 53531520421. The next prime is 53531520443. The reversal of 53531520437 is 73402513535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53040853636 + 490666801 = 230306^2 + 22151^2 .

It is a cyclic number.

It is not a de Polignac number, because 53531520437 - 2⁴ = 53531520421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53531520437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53531520737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26765760218 + 26765760219.

It is an arithmetic number, because the mean of its divisors is an integer number (26765760219).

Almost surely, 2^53531520437 is an apocalyptic number.

It is an amenable number.

53531520437 is a deficient number, since it is larger than the sum of its proper divisors (1).

53531520437 is an equidigital number, since it uses as much as digits as its factorization.

53531520437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 38.

The spelling of 53531520437 in words is "fifty-three billion, five hundred thirty-one million, five hundred twenty thousand, four hundred thirty-seven".